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Image forming apparatus, developing apparatus and developing roller for the image forming apparatus

Inactive Publication Date: 2008-11-27
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]The present general inventive concept provides a developing roller, a developing apparatus, and an image forming apparatus that can prevent a development hysteresis from occurring when using a two-component developer.

Problems solved by technology

That is, a development hysteresis may occur.
However, the above-described method can cause the toner layer formed on the surface of the developing roller to have a uniform thickness, but cannot cause toner of the toner layer to have a uniform charge.
Although the toner layer has a uniform thickness, unevenly charged toner of the toner layer has different development characteristics, thereby causing the development hysteresis.
Therefore, the above-described method has a drawback in which it cannot prevent the development hysteresis described above.

Method used

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  • Image forming apparatus, developing apparatus and developing roller for the image forming apparatus
  • Image forming apparatus, developing apparatus and developing roller for the image forming apparatus
  • Image forming apparatus, developing apparatus and developing roller for the image forming apparatus

Examples

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Embodiment Construction

[0031]Reference will now be made in detail to embodiments of the present general inventive concept, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. The embodiments are described below in order to explain the present general inventive concept by referring to the figures.

[0032]FIG. 1 is a conceptual view illustrating an image forming apparatus 1 according to an embodiment of the present general inventive concept, and FIG. 2 is a sectional view schematically illustrating a developing roller 30 capable of being used in the image forming apparatus 1 of FIG. 1.

[0033]Referring to FIG. 1, the image forming apparatus 1 according to an embodiment of the present general inventive concept includes a photosensitive medium 10, a developing apparatus 20, a transferring roller 50, and a fixing apparatus 60.

[0034]The photosensitive medium 10 is an image carrier on which a predetermined image is formed. In this emb...

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Abstract

A developing apparatus usable with an image forming apparatus may include a magnetic roller having disposed therein at least one magnet, and a developing roller rotatably disposed to face the magnetic roller and having a magnetic portion to contain a magnetic material that can be magnetized by a magnet of the at least one magnet disposed nearest to the developing roller.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit under 35 U.S.C. § 119(a) from Korean Patent Application No. 2007-49291 filed May 21, 2007 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present general inventive concept relates to an image forming apparatus. More particularly, the present general inventive concept relates to an image forming apparatus to use a two-component developer to print, and developing apparatus and developing roller used by the image forming apparatus.[0004]2. Description of the Related Art[0005]Generally, image forming apparatuses that use toner to print an image first form an electrostatic latent image on a photosensitive medium, and then supply the toner to the electrostatic latent image using a developing apparatus to form a toner image. The toner image formed on the photosensitive med...

Claims

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Application Information

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IPC IPC(8): G03G15/09
CPCG03G15/0808G03G15/0928G03G2215/0607G03G2215/0634G03G15/08
Inventor KUROGAWA, NAONORI
Owner SAMSUNG ELECTRONICS CO LTD
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